Right. An ekklesia is not a building, It is just a gathering of people summoned (called out) to a meeting for a specific purpose, like that of the guild of silversmiths (Acts 19:24,32) whose source of income was making small statuettes of the god Diana for tourists.
Because it was not a lawfully called meeting (verse 30), the local town clerk dismissed the assembly--in Greek the "ekklesia"--of artisans and sent them home (verse 41).
CB, I know you are aware of this--this is just a comment for the benefit of other participants who do not understand that "church" simply means the meeting of a club when the members are gathered together regarding their common interest.
The place where they meet is not the ekklesia.
>> Because it was not a lawfully called meeting (verse 30 39) . . . <<